Cummins Technical Interview Questions

Cloud computing consists of 3 layers in the hierarchy and these are as follows:

1. Infrastructure as a Service (IaaS) provides cloud infrastructure in terms of hardware like memory, processor speed etc.

2. Platform as a Service (PaaS) provides cloud application platform for the developers.

3. Software as a Service (SaaS) provides cloud applications which are used by the user directly without installing anything on the system. The application remains on the cloud and it can be saved and edited in there only.

Q2. How important is platform as a service?

ANS:

Platform as a Service is an important layer in cloud architecture. It is built on the infrastructure model, which provides resources like computers, storage and network. This layer includes organizing and operate the resources provided by the below layer. It is also responsible to provide complete virtualization of the infrastructure layer to make it look like a single server and keep it hidden from the outside world.

Q3. How does cloud computing provides on-demand functionality?

ANS:

Cloud computing is a metaphor used for internet. It provides on-demand access to virtualized IT resources that can be shared by others or subscribed by you. It provides an easy way to provide configurable resources by taking it from a shared pool. The pool consists of networks, servers, storage, applications and services.

Q4. What does software as a service provide?

ANS:

Software as Service is another layer of cloud computing, which provides cloud applications like Google is doing, it is providing Google docs for the user to save their documents on the cloud and create as well. It provides the applications to be created on fly without adding or installing any extra software component. It provides built in software to create wide varieties of applications and documents and share it with other people online.

Q5. What is the difference between scalability and elasticity?

ANS:

Scalability is a characteristic of cloud computing through which increasing workload can be handled by increasing in proportion the amount of resource capacity. It allows the architecture to provide on demand resources if the requirement is being raised by the traffic. Whereas, elasticity is being one of the characteristic provide the concept of commissioning and decommissioning of large amount of resource capacity dynamically. It is measured by the speed by which the resources are coming on demand and the usage of the resources.

Q6. What resources are provided by infrastructure as a service?

ANS:

Infrastructure as a Service provides physical and virtual resources that are used to build a cloud. Infrastructure deals with the complexities of maintaining and deploying of the services provided by this layer. The infrastructure here is the servers, storage and other hardware systems.

Q7. What is the purpose to use damper pulley to engine?

Q8. What is Docking Station?

Q9. What is the function of Choke?

Q10. What is Automatic Voltage regulator (AVR)?

Q11. Draw diesel engine cycles.

Q12. Explain the function of thermostat and applications.

Q13. Name the diesel engine parts and how they function?

Q14. Explain about diesel engine performance curves and testing.

Q15. Explain the working of fuel injector.

Q16. Difference between diesel engine and petrol engine.

Q17. Awareness about leading diesel engine manufacturers in the world.

Q18. What is forward stroke cutting?

Q19. What are the processes of manufacturing science?

Q20. How we can define the copper cable size if we know the aluminium cable size?

Q21. Why DG sets power factor is 0.8 lagging?

Q22. How to calculate 500 k.v a diesel generator efficiency?

Q23. What is the ratio of coolant level in DG?

Q24. Why a capacitor blocks the DC signal?

Q25. Is there any difference between inverter and a battery?

Q26. What is the earth resistance?

Q27. Can a motor acts as a generator?

Q28. What is the critical speed? Compare the critical speed of hollow shaft and solid shaft.

Q29. What is the use of dynamo? Why are you using that?

Q30. IGBT stands for?

Q31. What is the dimension of Watt?

Q32. How does a moving electron behaves in a magnetic field?

Q33. Describe what a turbocharger is and how it works. Draw a schematic diagram of the configuration of a multi turbocharger system.

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